CN1841166A - Oriented film, method for forming the same, liquid crystal plate and electronic equipment - Google Patents

Oriented film, method for forming the same, liquid crystal plate and electronic equipment Download PDF

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Publication number
CN1841166A
CN1841166A CNA200610068309XA CN200610068309A CN1841166A CN 1841166 A CN1841166 A CN 1841166A CN A200610068309X A CNA200610068309X A CN A200610068309XA CN 200610068309 A CN200610068309 A CN 200610068309A CN 1841166 A CN1841166 A CN 1841166A
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liquid crystal
oriented film
base
group
substrate
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CN100392502C (en
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黑泽龙一
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Seiko Epson Corp
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Seiko Epson Corp
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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F19/00—Ash-trays
    • A24F19/10—Ash-trays combined with other articles
    • A24F19/14—Ash-trays combined with other articles with extinguishers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F19/00—Ash-trays
    • A24F19/0071—Stands for ashtrays
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24F—SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F19/00—Ash-trays
    • A24F19/02—Ash-trays with removable insets
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
    • C09K2323/02—Alignment layer characterised by chemical composition
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
    • C09K2323/02—Alignment layer characterised by chemical composition
    • C09K2323/023—Organic silicon compound, e.g. organosilicon
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • G02F1/133715—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films by first depositing a monomer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • G02F1/133719—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films with coupling agent molecules, e.g. silane

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Silicon Polymers (AREA)
  • Laminated Bodies (AREA)

Abstract

An alignment film for controlling orientation of liquid crystal molecules is formed of an organic silicon material which includes in its molecule an affinity imparting group for enhancing affinity to the liquid crystal molecules and an orientation characteristic imparting group for controlling orientation of the liquid crystal molecules. The affinity imparting group is at least one selected from the group comprising a vinyl group, an alkylene group, and a cyanoalkyl group, and the orientation characteristic imparting group is at least one selected from the group comprising a phenyl group, a substituted phenyl group, a phenyl-alkyl group, a substituted phenyl-alkyl group, a branched alkyl group having carbon atoms of 3 to 12. Preferably, the organic silicon material includes organopolysilsesquioxane having a cage structure or a partially cleaved cage structure. A method of forming the alignment film is also provided, and a liquid crystal panel having the alignment film, and electronic equipment provided with the liquid crystal panel are also provided.

Description

Method, liquid crystal board and the electronic equipment of oriented film, formation oriented film
Cross reference
The full content of the Japanese patent application No.2005-096285 that submits on March 29th, 2005 is incorporated herein by reference clearly.
Technical field
The present invention relates to a kind of oriented film (alignment films), a kind of method of oriented film, a kind of liquid crystal board and electronic equipment of forming, and more specifically, relate to a kind of organic membrane, a kind ofly form the method for oriented film, a kind of liquid crystal board that is equipped with oriented film, and the electronic equipment that is equipped with liquid crystal board.
Background technology
Known have the projection display device of projected image on screen.In this class projection display device of great majority, liquid crystal board is used to form image.
This liquid crystal board has oriented film (alignment films) usually, and oriented film is provided for presenting a predetermined tilt angle, with liquid crystal molecule is directed or be oriented on the fixing direction.Method as for this oriented film of preparation, known for example a kind of like this method, that wherein will form by macromolecular compound such as polyimide and be formed on the substrate film by with fabric of regenerated fiber etc. in one direction friction film carry out friction treatment (referring to, JP-A No.H10-161133 for example).
But the oriented film that is formed by macromolecular compound such as polyimide is because various factors may cause that as the environment that uses, the time of use etc. light worsens.When this light worsened generation, the material that forms oriented film, liquid crystal layer etc. decomposed easily, and its decomposition product may influence the performance of liquid crystal unfriendly.In addition, in friction treatment, produce static, and produce dust, thereby reduce the reliability of liquid crystal board.
In order to solve this class problem, attempt adopting the oriented film that forms by inorganic material.Usually, form the inorganic oriented film of this class by the inclination vapour deposition process.
Compare with the oriented film that is formed by organic material, this organic oriented film has good photostability and thermotolerance, but conversely, has the low problem of ability of its aligned liquid-crystal molecule.
Summary of the invention
Summary of the invention
The present invention considers that problem recited above makes.Therefore, one object of the present invention is to provide a kind of oriented film (alignment films) with excellent in resistance photosensitiveness and excellent orientation characteristic (that is, regulating the function of the state of orientation of liquid crystal material).In addition, a further object of the invention is to provide a kind of method of making described oriented film, and this method can be made this oriented film effectively.In addition, a further object of the invention is to provide a kind of electronic equipment that is equipped with the liquid crystal board of this oriented film and is equipped with liquid crystal board.
In order to reach purpose recited above, the present invention relates to a kind of oriented film that is used to control liquid crystal molecule orientation (orientation).This oriented film is mainly formed by organosilicon material, and described organosilicon material in its molecule, have at least a be used to improve give base with the affinity of liquid crystal molecule affinity and at least a orientation characteristic that is used to control liquid crystal molecular orientation is given base.
This makes can provide a kind of oriented film that excellent in resistance photosensitiveness and excellent orientation characteristic (that is, regulating the function of the state of orientation of liquid crystal material) are arranged.
In oriented film according to the present invention, it is to be selected from least a in the group that comprises vinyl, alkylene base and cyano group alkyl that preferred described affinity is given base.
Because these groups can effectively improve the affinity with liquid crystal molecule, thus can be with stable manner directional crystal molecule more, thus improve the orientation characteristic.
In addition, in oriented film of the present invention, it is to be selected from the phenyl-alkyl of the phenyl that comprises phenyl, replacement, phenyl-alkyl, replacement and to contain at least a in the group of branched alkyl of 3 to 12 carbon atoms that also preferred described orientation characteristic is given base.
The use of this group tilt angle of liquid crystal molecule effectively is set to needed angle, thereby can show more excellent orientation characteristic.
In addition, in oriented film of the present invention, also preferred described organosilicon material contains as the affinity that contains of its key component to be given base and is orientated the silicone materials that characteristic is given base.
This also makes can provide the oriented film with excellent in resistance photosensitiveness and excellent orientation characteristic.
In this case, preferred described silicone materials comprises organic polysilsesquioxane of the cage structure that has cage structure or partly split.
This also makes to provide to have the more oriented film of excellent in resistance photosensitiveness and more excellent orientation characteristic.
In addition, in oriented film of the present invention, also preferred described silicone materials is that the polycondensation by alkoxy silane forms.
This makes can easily prepare described silicone materials.
In this case, preferred described alkoxy silane comprises that two or more have the different alkoxysilane compound containing trialkylsilyl group in molecular structure of forming.
This makes the affinity that can easily be adjusted in the organosilicon material that constitutes oriented film give base and be orientated the ratio that exists that characteristic is given base.
In this case, preferred described alkoxysilane compound containing trialkylsilyl group in molecular structure with different compositions comprise that containing affinity gives the alkoxysilane compound containing trialkylsilyl group in molecular structure of base and contain the alkoxysilane compound containing trialkylsilyl group in molecular structure that the orientation characteristic is given base.
This also makes the affinity that can easily be adjusted in the organosilicon material that constitutes described oriented film give base and be orientated the ratio that exists that characteristic is given base.
In addition, in oriented film of the present invention, also the weight-average molecular weight of preferred described organosilicon material is 500 to 50,000.
This feasible oriented film that can obtain to have optics and physical stability.
Another aspect of the present invention relates to a kind of method that forms the oriented film that limits in the claim 1.This method may further comprise the steps:
The preparation substrate;
Prepare oriented film and form liquid, described oriented film forms liquid and contains the material that is used to form described organosilicon material, and described material contains as the affinity that contains of its key component to be given base and be orientated the silicone materials that characteristic is given base;
Described oriented film is formed liquid to be applied on the substrate; And
The oriented film that contains described silicone materials that is coated with is formed liquid-solidization, on substrate, to form described oriented film.
According to oriented film formation method recited above, can form oriented film effectively with excellent in resistance photosensitiveness and excellent orientation characteristic.
In the described in the above oriented film formation method, preferred described silicone materials is that the polycondensation by alkoxy silane forms, and contains at least a curing reaction base that helps described oriented film to form the curing reaction of liquid.
This makes and can improve the film formation characteristic that oriented film forms liquid.As a result, can form oriented film with physical stability.
In this case, preferred described curing reaction base is to be selected from least a in the group that comprises glycidoxy-alkyl, alicyclic epoxy base-alkyl, acryloyl group, methacryl, styryl and styryl-alkyl.
The use of these groups can easily form stable oriented film.
In the described in the above oriented film formation method, the curing reaction that preferred described oriented film forms liquid is to carry out with the curing reaction base that solidifies described silicone materials by thermal treatment and/or energy light radiation treatment.
This also makes can easily form stable oriented film.
Another aspect of the present invention relates to a kind of liquid crystal board, and it comprises:
Liquid crystal layer, it has two faces;
A pair of oriented film, it contacts two faces of described liquid crystal layer respectively, and each oriented film is directed film formed by what limit in the claim 1; With
Pair of electrodes, it offers this to oriented film, and described electrode is not in the face of described liquid crystal layer.
This liquid crystal board has excellent photostability and excellent orientation characteristic.
Further aspect of the present invention relates to electronic equipment, and it is equipped with the liquid crystal board that is limited by claim 14.
This electronic equipment has high reliability.
These and other objects of the present invention, structure and benefit will be clearer from the detailed Description Of The Invention of carrying out below with reference to accompanying drawing and embodiment.
Description of drawings
Fig. 1 is the longitudinal profile synoptic diagram that shows the liquid crystal board of first embodiment of the invention.
Fig. 2 is the longitudinal profile synoptic diagram that shows the liquid crystal board of second embodiment of the invention.
Fig. 3 is the skeleton view of mobile model (or this type of pen meter) personal computer, and described personal computer is an example of electronic equipment of the present invention.
Fig. 4 is the portable phone skeleton view of (comprising personal handyphone system (PHS)), another example that described phone is an electronic equipment of the present invention.
Fig. 5 is the skeleton view of digital camera, another example that described digital camera is an electronic equipment of the present invention.
Fig. 6 is the view that schematically shows the optical system of electronic equipment of the present invention (projection display device).
Embodiment
Detailed Description Of The Invention
Below, the present invention will describe in detail with reference to the accompanying drawings.
Before explaining oriented film (alignment films) and forming the method for oriented film (alignment films), will at first explain according to liquid crystal board of the present invention.
Fig. 1 is the longitudinal profile synoptic diagram that shows the liquid crystal board of first embodiment of the invention.
As shown in Figure 1, liquid crystal board 1A comprise liquid crystal layer 2, oriented film (alignment films) 3A and 4A, as nesa coating 5 and 6, polarizing coating 7A and 8A and substrate 9 and 10 of electrode.
Liquid crystal layer 2 is mainly formed by liquid crystal material.
The liquid crystal material that forms liquid crystal layer 2 can be any liquid crystal material, as nematic crystal or smectic crystal, as long as can the aligned liquid-crystal material.But, under the situation of TN-type liquid crystal board, be preferably formed the liquid crystal material of nematic crystal.The example of liquid crystal material comprises: cyclohexylbenzene derivant liquid crystal, biphenyl derivatives liquid crystal, vinyl cyclohexane derivant liquid crystal, terphenyl derivant liquid crystal, phenyl ether derivant liquid crystal, phenyl ester derivatives liquid crystal, bis cyclohexane derivant liquid crystal, azometin derivant liquid crystal, azoxy radical derivative liquid crystal, pyrimidine derivatives liquid crystal, dioxane derivatives liquid crystal and cubane derivant liquid crystal, etc.Liquid crystal material also comprises by fluoro substituents is introduced into the nematic crystal molecule as one fluorine-based, two fluorine-based, three fluorine-based, trifluoromethyl or trifluoromethoxy and obtains liquid crystal molecule.
Oriented film 3A and 4A are placed on two surfaces of liquid crystal layer 2.
Oriented film 3A is formed on after a while on the matrix of describing of being made up of nesa coating 5 and substrate 9 100.Oriented film 4A is formed on after a while on the matrix of describing of being made up of nesa coating 6 and substrate 10 101.That is, provide an oriented film to contact with each electrode.
Oriented film 3A and 4A have the function of the state of orientation (when not applying voltage) of regulating the liquid crystal material (liquid crystal molecule) that forms liquid crystal layer 2.
These oriented films 3A and 4A are formed by for example method described below (that is, the method for oriented film formed according to the present invention), and they are mainly formed by organosilicon material.
Organosilicon material is the compound substance of polysiloxane and organic compound, and it is compared with other organic material and has excellent chemical stability.Therefore, compare with the oriented film that is formed by organic material of routine, oriented film of the present invention can have excellent photostability.
Particularly, in the present invention, as the organosilicon material that constitutes oriented film, use in its molecule, comprise at least a be used for improving give base with the affinity of liquid crystal material recited above (liquid crystal molecule) affinity and at least a orientation characteristic that is used to control liquid crystal molecular orientation is given basic organosilicon material, and this is a feature of the present invention.
In this, should be noted that with prior art and compare that the oriented film that is formed by inorganic material has good photostability by the oriented film that organic material forms.But on the other hand, the affinity of this oriented film that is formed by inorganic material and liquid crystal molecule is low, so exist it to be difficult to regulate the problem of liquid crystal molecular orientation state, promptly the ability of oriented film aligned liquid-crystal molecule is low.
But, as mentioned above, as the organosilicon material that constitutes oriented film, the present invention use in its molecule, comprise at least a be used for improving give base with the affinity of liquid crystal material recited above (liquid crystal molecule) affinity and at least a orientation characteristic that is used to control liquid crystal molecular orientation is given basic organosilicon material, thereby improve affinity with liquid crystal molecule, so liquid crystal molecule can be pulled to oriented film, thereby easily regulate the state of orientation of liquid crystal molecule.This makes the orientation characteristic give the state of orientation that base can be regulated liquid crystal molecule, thus the aligned liquid-crystal molecule, to have needed tilt angle.The result can provide to have excellent orientation characteristic (that is, regulating the function of the state of orientation of liquid crystal material) and excellent sunproof oriented film thus.In addition, owing to also improved bounding force with transparency electrode, so also improved the reliability of the electronic equipment that finally obtains.
Only contain at organosilicon material that affinity is given base or the orientation characteristic is given in the base under any situation, can not obtain these benefits.
That is, only contain affinity at organosilicon material and give under the situation of base, liquid crystal molecule can be pulled to the surface of oriented film, but be difficult to liquid crystal molecular orientation on predetermined direction.On the other hand, only contain the orientation characteristic at organosilicon material and give under the situation of base, be difficult to fully liquid crystal molecule be pulled to the surface of oriented film, reason is with the affinity of liquid crystal molecule low, thereby is difficult to regulate the directed state of liquid crystal molecule.
The example that affinity is given base comprises: the phenyl of vinyl, alkylene base, cyano group alkyl, phenyl, replacement, alkylidene etc.
In these groups, can preferably give base as the affinity that is included in the organosilicon material that constitutes oriented film 3A and 4A with vinyl, alkylene base, alkylidene and cyano group alkyl.Organosilicon material can contain at least a or two of these groups or more kinds ofly give base as its affinity.This makes and can more effectively improve affinity with liquid crystal molecule, thus can be with stable status directional crystal molecule more, thus improve its orientation characteristic.
In addition, the orientation characteristic example of giving base comprise phenyl, phenyl-alkyl, the replacement of phenyl, replacement phenyl-alkyl, contain the branched alkyl of 3 to 12 carbon atoms etc.
In this embodiment, the organosilicon material that preferably constitutes oriented film 3A and 4A contains at least a or two or multiple of these groups and gives base as the orientation characteristic.This make can be preferablyly with the direction of orientation orientation of liquid crystal molecule, thereby show more excellent orientation characteristic.
In the described in the above group, especially preferably with the phenyl-alkyl of phenyl, phenyl-alkyl and the replacement of phenyl, replacement as organosilicon material.Because the use of these groups can improve the affinity with liquid crystal molecule, thus can be with stable status directional crystal molecule, thus can have more excellent orientation characteristic.
As for organosilicon material recited above, the preferred organic polysilsesquioxane that uses the cage structure that has cage structure or partly split.The feasible relative abundance (having ratio relatively) that can change in the mode of arbitration between affinity and the orientation characteristic of the use of this material.In addition, can also obtain having the oriented film of high-fire resistance and high visible transmission performance.
In addition, the weight-average molecular weight of preferred organosilicon material is 500 to 50,000, more preferably 700 to 50,000.This makes can obtain optics and the stable oriented film of physical property.
In addition, the average thickness of preferred orientation film 3A and 4A is 0.01 to 10 μ m, 0.01 to 0.1 μ m more preferably, and 0.02 to 0.05 μ m more preferably again.If the average thickness of oriented film is lower than lower limit, possible situation is according to composition of organosilicon material etc., can not show the function as oriented film fully.On the other hand, if the average thickness of oriented film surpasses the upper limit, therefore driving voltage also improves, thus have can not drive TFT possibility, this depends on its kind.
Nesa coating 5 is placed on the outside surface of oriented film 3A, promptly oriented film 3A and its are in the face of on the surperficial facing surfaces of liquid crystal layer 2.Similarly, nesa coating 6 is placed on the outside surface of oriented film 4A, promptly oriented film 4A and its are in the face of on the surperficial facing surfaces of liquid crystal layer 2.
Nesa coating 5 and 6 has the function that drives liquid crystal layer 2 liquid crystal molecules (changing its orientation) when electric current flows between them.
The control of flowing for electric current between nesa coating 5 and 6 is to carry out from the electric current of the control circuit (not shown) that is connected with nesa coating by the control supply.
Nesa coating 5 and 6 has electric conductivity, and is by for example indium tin oxide (ITO) or tin oxide (SnO 2) form.
Substrate 9 is placed on the outside surface of nesa coating 5, that is, and on nesa coating 5 and its surface in the face of the surface opposite of oriented film 3A.Similarly, substrate 10 is placed on the outside surface of nesa coating 6, that is, and on nesa coating 6 and its surface in the face of the surface opposite of oriented film 4A.
Substrate 9 and 10 has aforesaid liquid crystal layer 2, oriented film 3A and 4A and nesa coating 5 and 6 of support, and polarizing coating 7A that describes after a while and the function of 8A.The material that is used to form substrate 9 and 10 is not particularly limited.The example of material comprises glass such as quartz glass and plastic material such as polyethylene terephthalate.In these materials, particularly, the preferred material that forms by glass such as quartz glass.This makes and can obtain more difficult warpage or crooked and have a liquid crystal board of excellent stability.In this, should be noted in the discussion above that and from Fig. 1, omitted encapsulant, distribution etc.
7A is placed on the outside surface of substrate 9 with polarizing coating (chip polarizer or light polarizing film), that is, and and on substrate 9 and its surface in the face of the surface opposite of nesa coating 5.Similarly, 8A is placed on the outside surface of substrate 10 with polarizing coating (chip polarizer or light polarizing film), that is, and and on substrate 10 and its surface in the face of the surface opposite of nesa coating 6.
The example that forms the composition material of polarizing coating 7A and 8A comprises polyvinyl alcohol (PVA) (PVA) etc.These polarizing coatings can be to form by iodine being entrained in the material that obtains in the composition material recited above.
In addition, as for polarizing coating 7A and 8A, can also use film by will on the single shaft direction, stretching and obtain by the film that material recited above forms.
By using this polarizing coating 7A and 8A, can carry out the control of penetrability by the amount that is adjusted in the electric current that flows between nesa coating 5 and 6 with guaranteeing more.
Usually determine polarizing coating 7A and the 8A direction of polarization axle separately according to inorganic oriented film 3A and 4A direction of orientation separately.
Then, the method for oriented film formed according to the present invention will be explained.
In this, should be noted in the discussion above that following will being described for a kind of sample situation that forms the method for oriented film of the present invention, wherein said oriented film is to be made of the organic polysilsesquioxane with cage structure or the part cage structure of splitting.
The method of the formation oriented film of this embodiment may further comprise the steps: the polysilsesquioxane material preparation step that is used for preparing by two or more polycondensations with different alkoxysilane compound containing trialkylsilyl group in molecular structure of forming polysilsesquioxane (polysiloxane) material; Be used to prepare the oriented film formation liquid preparation process that the oriented film that contains resulting polysilsesquioxane material forms liquid; The oriented film that coating obtains on base material forms liquid and forms step with the coating layer that forms coating layer; With the curing schedule that is used to solidify formed coating layer.
＜polysilsesquioxane material preparation step 〉
(1) at first, prepare multiple alkoxysilane compound containing trialkylsilyl group in molecular structure.Multiple alkoxysilane compound containing trialkylsilyl group in molecular structure comprises: contain affinity and give the alkoxysilane compound containing trialkylsilyl group in molecular structure of base, contain the alkoxysilane compound containing trialkylsilyl group in molecular structure that the orientation characteristic is given the alkoxysilane compound containing trialkylsilyl group in molecular structure of base and contained the curing reaction base, described curing reaction base helps curing reaction when forming the coating layer of describing after a while.Prepare these alkoxysilane compound containing trialkylsilyl group in molecular structure, make in the oriented film that finally obtains functional group such as affinity give base and be orientated characteristic and give the relative ratio that exists of base etc. and become needed ratio, wherein determine the ratio of alkoxysilane compound containing trialkylsilyl group in molecular structure, with corresponding to needed ratio.
By using multiple alkoxysilane compound containing trialkylsilyl group in molecular structure, can be adjusted in easily that affinity in the organosilicon material that constitutes oriented film is given base and the orientation characteristic is given the basic relative ratio that exists.
Containing affinity gives the example of alkoxysilane compound containing trialkylsilyl group in molecular structure of base and comprises: vinyltrimethoxy silane, 3-cyano group propyl-triethoxysilicane, allyltrimethoxysilanis, allyltrimethoxysilanis, allyl three isopropoxy silane, the butenyl group trimethoxy silane, the butenyl group triethoxysilane, butenyl group three isopropoxy silane, 2-cyano ethyl trimethoxy silane, 2-cyano ethyl triethoxysilane, 2-cyano ethyl three isopropoxy silane, 3-cyano group propyl-triethoxysilicane, 3-cyano group propyl group three isopropoxy silane, (3-cyano group butyl) methyltrimethoxy silane, (3-cyano group butyl) ethyl trimethoxy silane, (3-cyano group butyl) methyl three isopropoxy silane etc.
In addition, containing the orientation characteristic gives the example of alkoxysilane compound containing trialkylsilyl group in molecular structure of base and comprises: phenyltrimethoxysila,e, isobutyl trimethoxy silane, phenyl triethoxysilane, phenyl three isopropoxy silane, isobutyl triethoxysilane, isobutyl three isopropoxy silane, isopropyl trimethoxy silane, isopropyl triethoxysilane, isopropyl three isopropoxy silane, phenethyl trimethoxy silane, phenethyl triethoxysilane, phenethyl three isopropoxy silane etc.
The curing reaction base is to have by the react to each other functional group of the function of solidifying coating layer of curing reaction base under predetermined condition.Contain the alkoxysilane compound containing trialkylsilyl group in molecular structure of this curing reaction base by use, can improve the coating layer that oriented film forms liquid and form performance (pre-coating performance).As a result, can form oriented film with stable physical property.
The example of this curing reaction base comprises: glycidoxy-alkyl, alicyclic epoxy base-alkyl, acryloyl group alkyl, methacryl alkyl, vinyl, alkylene base, alkylidene, styryl and styryl-alkyl etc.
In these curing reaction bases, preferably use glycidoxy-alkyl, alicyclic epoxy base-alkyl and methacryl alkyl.Contain the alkoxysilane compound containing trialkylsilyl group in molecular structure of this functional group by use, can form stable oriented film effectively.
The example that contains the alkoxysilane compound containing trialkylsilyl group in molecular structure of this curing reaction base comprises: 3-glycidoxy propyl-triethoxysilicane, 2-(3, the 4-epoxycyclohexyl) ethyl trimethoxy silane, 3-methacryloxypropyl trimethoxy silane etc.
(2) then, multiple alkoxysilane compound containing trialkylsilyl group in molecular structure recited above, water and diluting solvent (if desired) are mixed mutually, obtain its potpourri with predetermined mixture ratio.The representative instance of this diluting solvent comprises alcohols such as methyl alcohol, ethanol, isopropyl alcohol etc., ethers such as diethyl ether, tetrahydrofuran (THF) etc., ketone such as acetone, methyl isobutyl ketone etc. and hydro carbons such as toluene etc.
(3) then, hydrolysis is added to the potpourri that obtains thus with catalyzer such as acid catalyst, base catalyst etc., wherein potpourri is stirred.These catalyzer can be added in advance solvent or the water that is used for reacting.
The example of this acid catalyst (comprising solid acid catalyst) comprising: mineral acid such as sulfuric acid, nitric acid, phosphoric acid and organic acid such as organic sulfonic acid (for example benzene sulfonic acid, p-toluenesulfonic acid, naphthalene sulfonate, methane-sulforic acid, ethyl sulfonic acid etc.).
In addition, the example of this base catalyst comprises: inorganic base such as ammonia, NaOH, potassium hydroxide, sodium carbonate, sal tartari etc., with organic base such as triamine (for example, trimethylamine, triethylamine, tri-n-butylamine, triethanolamine, pyridine etc.), tetraalkylammonium hydroxide, choline etc.In these alkali, preferably use NaOH, potassium hydroxide and tetraalkylammonium hydroxide, because having as the high activity of alkali and after processing, they remove easily.
(4) after adding hydrolyst, under agitation with mixture heated to predetermined temperature, thereby cause the polycondensation reaction of alkoxysilane compound containing trialkylsilyl group in molecular structure.
Predetermined temperature (temperature of reaction) is preferably 5 to 140 ℃, and is preferably 30 to 60 ℃.If temperature of reaction is too high, the situation that exists the curing reaction base to react to each other.On the other hand, if temperature of reaction is too low, becoming of reaction is slow significantly.
In addition, the preferred reaction time is 1 to 48 hour, and more preferably 3 to 18 hours.If the reaction time is oversize, the situation that exists the curing reaction base to react to each other.On the other hand, if the reaction time is too short, reaction is not finished.
(5) then, if desired, carry out other and handle as the removal of neutralization, diluting solvent, drying etc.
By aforesaid method, can obtain having the polysilsesquioxane material (that is silicone materials) of the cage structure that cage structure or part split.
＜oriented film forms the liquid preparation process 〉
Then, preparation contains the oriented film formation liquid (alignment films formation liquid) of the polysilsesquioxane material that obtains in the described step in the above.
In this, should be noted in the discussion above that the polysilsesquioxane material former state that obtains in the described step in the above can be used for oriented film forms liquid, perhaps if desired, any solvent etc. can be added wherein.In addition, if desired, hardening agent (polymerization initiator) can be added to oriented film and form in the liquid.By using this oriented film to form liquid, can easily carry out the curing of coating layer (it is described in detail after a while).
The example of this hardening agent comprises Photoepolymerizationinitiater initiater such as benzophenone, 1-hydroxycyclohexylphenylketone, (thiophene oxy phenyl) hexichol sulfonium hexafluorophosphate, two (hexichol sulfonium) diphenylsulfide hexafluorophosphate etc. and thermal polymerization such as azoisobutyronitrile, azo nitrile dimethyl etc.These hardening agent can use separately or they two or more are used in combination.
In addition, if desired, oriented film can be formed liquid and carry out filtration treatment.This makes can remove in oriented film formation liquid and contains impurity, thereby can form the oriented film with uniform thickness effectively.
＜coating layer forms step 〉
Then, the oriented film that obtains in the described step is in the above formed liquid be coated on the base material (base material 100 and 101), form and form the coating layer that liquid forms by oriented film.
Be coated in method on the base material as for oriented film being formed liquid, can adopt the whole bag of tricks, be coated with method, spraying process, spin-coating method, cutter as intaglio plate rubbing method, rod and be coated with method, rolling method, mouthful pattern rubbing method etc.
＜curing schedule 〉
The coating layer that forms is thus solidified, form oriented film (oriented film 3A and 4A).Can wait the curing of carrying out coating layer by thermal treatment, energy light radiation treatment.The example of energy light comprises luminous ray, ultraviolet ray, radioactive ray, infrared ray etc.
By carrying out this processing, make curing reaction base recited above polymerization mutually, thereby coating layer is solidify to form oriented film by free radical polymerization, cationic polymerization, polycondensation etc.As a result, can obtain being used for the substrate of electron device, described substrate is made up of base material and the oriented film that is formed on the base material.
In this, after preferably moisture that will contain and/or solvent are removed, that is, after coating layer is carried out dried, carry out the curing of coating layer in will being used to form the oriented film formation liquid of coating layer.This makes can form the oriented film with uniform films thickness effectively.
Alternatively, can carry out the curing of coating layer by two steps, described two steps comprise coating layer primary solidification that the irradiation by energy light carries out and the regelate that is undertaken by thermal treatment after primary solidification.That is, coating layer can full solidification after it is by low-yield relatively precuring.This makes can form the oriented film with uniform films thickness effectively.
In addition, can after the curing of coating layer, carry out friction treatment.This feasible oriented film that can obtain having more excellent orientation characteristic.
Below, will carry out description about liquid crystal board second embodiment of the present invention.
Fig. 2 is the longitudinal profile synoptic diagram that shows liquid crystal board in the second embodiment of the invention.Below will mainly explain the different of liquid crystal board in the liquid crystal board 1B shown in Fig. 2 and first embodiment, and omit explanation those projects identical with first embodiment.
As shown in Figure 2, liquid crystal board (TFT liquid crystal board) 1B comprises: TFT substrate (liquid crystal drive substrate) 17, the oriented film 3B that combines with TFT substrate 17, liquid crystal board is with relative substrate 12, with the oriented film 4B of liquid crystal board with relative substrate 12 combinations, be filled between oriented film 3B and the oriented film 4B liquid crystal layer of forming by liquid crystal 2 in the gap, with TFT substrate (liquid crystal drive substrate) 17 outside surfaces, be TFT substrate 17 and its surface in the face of the surface opposite of oriented film 3B, in conjunction with polarizing coating 7B, with with liquid crystal board with relative substrate 12 outside surfaces, be liquid crystal board with relative substrate 12 and its surface in the face of the surface opposite of oriented film 4B, in conjunction with polarizing coating 8B.
Oriented film 3B and 4B form by forming the identical method of the method (the present invention forms the method for oriented film) of oriented film 3A and 4A with first embodiment.Polarizing coating 7A and the 8A with first embodiment is identical respectively with 8B for polarizing coating 7B.
Liquid crystal board comprises with relative substrate 12: lenticule substrate 11, be provided on the superficial layer 114 of lenticule substrate 11 and wherein form the black matrix 13 of opening 131 and be provided on the superficial layer 114 to cover the nesa coating (ordinary electrode) 14 of black matrix 13.
Lenticule substrate 11 comprises having substrate (first substrate) 111 and the superficial layer (second substrate) 114 of lenticule with concave part, in substrate 111, form a plurality of (in a large number) concave part (lenticule concave part), each concave part has the surface of concave surface bended, and described superficial layer 114 is by resin bed (adhesive phase) 115 and the surface combination that lenticule is used the substrate 111 of concave part that has that wherein is formed with concave part 112.In resin bed 115, form lenticule 113 with the resin that is filled in the concave part 112.
Having lenticule is made by plane base material (transparent substrates) with the substrate 111 of concave part.A plurality of (in a large number) concave part 112 is formed on the surface of substrate 111 with lenticule usefulness concave part.Can form concave part 112 by use masks such as dry etching method, Wet-type etching methods.
Having lenticule is formed by glass etc. with the substrate 111 of concave part.
In this, the thermal expansivity of preferred substrates is substantially equal to the thermal expansivity (for example, the ratio of the thermal expansivity of base material and glass substrate 171 is about 1/10 to 10) of glass substrate 171.Therefore, in the liquid crystal board that obtains, can prevent when temperature variation warpage, bending that the difference by thermal expansivity causes effectively, peel off etc.
Consider preferably have lenticule and form by same material with the substrate 111 of concave part and glass substrate 171 from this viewpoint.Therefore, can prevent effectively when temperature variation warpage, bending that the difference by thermal expansivity causes, peel off etc.
Particularly, when the TFT liquid crystal board that lenticule substrate 11 is used for make, preferably have lenticule and form by quartz glass with the substrate 111 of concave part by high temperature polysilicon.The TFT liquid crystal board contains the TFT substrate as the liquid crystal drive substrate.For this TFT substrate, preferably use its characteristic because the environment when making and the quartz glass of more difficult change.This makes to have the substrate 111 of lenticule with concave part by being formed by quartz glass, can obtain having the TFT liquid crystal board of excellent stability, wherein more difficult generation warpage, bending etc.
Has the resin bed (adhesive phase) 115 that covering concave part 112 is provided on the upper surface of lenticule with the substrate 111 of concave part.
Concave part 112 is filled with the material that is used to form resin bed 115, forms lenticule 113 thus.
This can be higher than to form and has lenticule and form resin bed 115 with the resin (bonding agent) of the refractive index of the material of the substrate 111 of concave part with refractive index.Can wait with acrylic resin, epoxy resin, ultraviolet curable resin such as acrylic acid epoxy resin aptly and form resin bed 115.
Flat surfaces layer 114 is provided on the upper surface of resin bed 115.
Can form superficial layer (glassy layer) 114 with glass.In this case, the thermal expansivity of preferred surface layer 114 is substantially equal to have lenticule with the thermal expansivity of the substrate 111 of concave part (for example, superficial layer 114 and have lenticule be about 1/10 to 10 with the ratio of the thermal expansivity of the substrate 111 of concave part).Therefore, can prevent effectively by having warpage, bending that the difference of lenticule with the substrate 111 of concave part and the thermal expansivity between the superficial layer 114 cause, peeling off etc.Is when being formed by same material when having lenticule with the substrate 111 of concave part and superficial layer 114, more effectively obtains this effect.
When lenticule substrate 11 is used for liquid crystal board, consider that from obtaining necessary optical characteristics the thickness of superficial layer 114 is set to about 5 to 1000 μ m usually, more preferably is set to about 10 to 150 μ m.
Can also form superficial layer (screen layer) 114 with pottery.The example of operable pottery comprises: nitride ceramics such as AlN, SiN, TiN and BN, oxide ceramic such as Al 2O 3And TiO 2And carbide ceramics such as WC, TiC, ZrC and TaC.When superficial layer 114 is when being formed by pottery, the thickness of superficial layer 114 is not particularly limited.But preferably the thickness of superficial layer 114 is set to about 20nm to 20 μ m, more preferably is set to about 40nm to 1 μ m.In this, if should be noted in the discussion above that this superficial layer 114 it not necessarily, then can omit.
Black matrix 13 has high light and blocks performance, and is to be formed by metal such as Cr, Al, Al alloy, Ni, Zn or Ti or the resin that wherein is dispersed with carbon or titanium.
Nesa coating 14 has electric conductivity and is by indium tin oxide (ITO), indium oxide (IO) or tin oxide (SnO 2) wait formation.
TFT substrate 17 is the substrates that are used to drive the liquid crystal of liquid crystal layer 2, and comprise: glass substrate 171, a plurality of (in a large number) pixel electrode 172 that is provided on the glass substrate 171 and settles with matrix form, and corresponding to a plurality of (in a large number) thin film transistor (TFT) (TFT) 173 of each pixel electrode 172.Among Fig. 2, do not show encapsulant, distribution etc.
Owing to reason recited above, preferred glass substrate 171 is formed by quartz glass.
Pixel electrode 172 charges between nesa coating (ordinary electrode) 14 and pixel electrode 172 and discharges, thereby drives the liquid crystal of liquid crystal layer 2.Pixel electrode 172 is by for example forming with the material identical materials of nesa coating 14.
With thin film transistor (TFT) 173 with corresponding to and near be provided at the thin film transistor (TFT) 173 pixel electrode 172 be connected.Thin film transistor (TFT) 173 is connected with the control circuit (not shown) and controls the electric current that is supplied to pixel electrode 172.Therefore, the charging of pixel electrode 172 and discharge controlled.
Oriented film 3B is combined with the pixel electrode 172 of TFT substrate 17.With oriented film 4B and nesa coating 14 combinations of liquid crystal board with relative substrate 12.That is, provide an oriented film to contact with each electrode.
Liquid crystal layer 2 is formed by liquid crystal material (liquid crystal molecule).The orientation of liquid crystal molecule, that is, and the orientation of liquid crystal, response charging of pixel electrode 172 and discharge and change.
In this liquid crystal board 1B, usually, lenticule 113, corresponding to the opening 131 of the black matrix 13 of lenticule 113 optical axis Q, pixel electrode 172 and a thin film transistor (TFT) 173 that is connected pixel electrode 172 corresponding to a pixel.
The incident light L that comes with relative substrate 12 side incidents from liquid crystal board is by having the substrate 111 of lenticule with concave part, and transmission is by opening 131, nesa coating 14, liquid crystal layer 2, pixel electrode 172 and the glass substrate 171 of resin bed 115, superficial layer 114, black matrix 13, simultaneously, when incident light L when the lenticule 113 by optically focused.Here, because polarizing coating 8B is provided on the light incident side of lenticule substrate 11, when liquid crystal layer 2 was passed through in incident light L transmission, incident light was changed into linearly polarized photon.Under the sort of situation, combine with the state of orientation of liquid crystal layer 2 liquid crystal molecules, control the polarization direction of incident light L.Therefore, by polarizing coating 7B, can control radiative brightness by transmission incident light L, described incident light L transmission is by liquid crystal board 1B.
As mentioned above, liquid crystal board 1B has lenticule 113, and the incident light L by lenticule 113 by optically focused, and the opening 131 by black matrix 13.On the other hand, do not form in the part of opening 131 in black matrix 13, incident light L is blocked.Therefore, in liquid crystal board 1B, prevented that unwanted light from leaking from the part beyond the pixel, and the decay of the incident light L in pixel portion is controlled.Therefore, liquid crystal board 1B has high transmittance in pixel portion.
Can make liquid crystal board 1B by following method: respectively the TFT substrate of making by known method 17 and liquid crystal board with relative substrate 12 on, form oriented film 3B and 4B, then, by the encapsulant (not shown) with TFT substrate 17 and liquid crystal board with relative substrate 12 combinations, filler opening by the gap portion that forms with relative substrate 12 combinations by TFT substrate 17 and liquid crystal board, liquid crystal is injected into this gap portion, closes this filler opening then.
In liquid crystal board 1B, the TFT substrate is used as the liquid crystal drive substrate.But, also liquid crystal drive substrate such as TFD substrate, the STN substrate etc. that are different from the TFT substrate can be used for the liquid crystal drive substrate.
Can aptly the liquid crystal board that comprises oriented film as mentioned above be used to have the liquid crystal board of intense light source and the liquid crystal board of outdoor utility.
Below, will on the basis of the embodiment shown in Fig. 3 to 5, explain the electronic equipment (liquid crystal indicator) that comprises top described liquid crystal board 1A in detail.
Fig. 3 is the skeleton view of mobile model (or this type of pen meter) personal computer, and described personal computer is an example of electronic equipment of the present invention.
In the figure, personal computer 1100 comprises main unit 1104, and described main unit 1104 comprises keyboard 1102 and display unit 1106.Supporting display unit 1106 can move it by hinge arrangement with respect to main unit 1104 rotations.
In personal computer 1100, display unit 1106 comprises do not show among liquid crystal board 1A and the figure backlight.Can be by coming display image (information) by liquid crystal board 1A from transmittance backlight.
Fig. 4 is the portable phone skeleton view of (comprising personal handyphone system (PHS)), another example that described phone is an electronic equipment of the present invention.
In the figure, portable phone 1200 comprises many action buttons 1202, receiver 1204 and microphone 1206, and do not show among liquid crystal board 1A and the figure backlight.
Fig. 5 is the skeleton view of digital camera, another example that described digital camera is an electronic equipment of the present invention.In the figure, also shown briefly and being connected of external device (ED).
Common camera exposure has the silver salt photographic film of theme optical imagery.On the other hand, digital camera 1300 usefulness imaging devices such as charge-coupled device (CCD) carry out opto-electronic conversion with the optical imagery of theme, to generate imaging signal (picture signal).
Liquid crystal board 1A and (not shown) backlight are provided on the back side of digital camera 1300 casings (housing) 1302.Digital camera 1300 shows on the basis of the imaging signal that is produced by CCD.Liquid crystal board 1A plays the function that is used to show as the view finder of the theme of electronic image.
Circuit board 1308 is arranged on the inside of casing.The storer that can store imaging signal is arranged on the circuit board 1308.
To comprise that the light receiving unit 1304 of optical lens (imaging optical system), CCD etc. is provided at the front (in the structure shown in the figure, overleaf) of casing 1302.
When cameraman's inspection was presented at the thematic map picture on the liquid crystal board 1A and presses shutter release button 1306, the imaging signal of CCD was passed to and was stored in the storer of circuit board 1308 this moment.
In digital camera 1300, VT 1312 and the I/O end 1314 that is used for data transmission are provided at casing 1,302 one sides.As shown in this figure, if desired, TV monitor 1430 and personal computer 1440 are connected to VT 1312 and the I/O end 1314 that is used for data transmission respectively.In addition, the operation according to predetermined exports the imaging signal that is stored in circuit board 1308 storeies to TV monitor 1430 and personal computer 1440.
Then, as an example of electronic equipment of the present invention, the electronic equipment (liquid crystal projection apparatus) that uses liquid crystal board 1B will be explained.
Fig. 6 is the view that schematically shows the optical system of electronic equipment of the present invention (projection display device).
As shown in this Fig, projection display device 300 comprises: light source 301, the lamp optical system that comprises a plurality of integrator lens, the color separation optical system (photoconduction optical system) that comprises a plurality of dichronic mirrors etc., liquid crystal light valve (liquid crystal light gate array) (red using) 24 corresponding to redness, liquid crystal light valve (liquid crystal light gate array) (green using) 25 corresponding to green, liquid crystal light valve (liquid crystal light gate array) (blue using) 26 corresponding to blueness, be formed with the dichronic mirror surface 211 that is used for reflect red only on it and be used for the only colour splitting prism on the dichronic mirror surface 212 of reflect blue (close coloured light and learn system) 21, and projecting lens (projection optical system) 22.
Lamp optical system comprises integrator lens 302 and 303.Color separation optical system comprises the dichronic mirror 305 of mirror 304,306 and 309, reflect blue and green glow (only transmit red light), only dichronic mirror 307, the only dichronic mirror 308 of reflect blue (or mirror of reflect blue) and the collector lens 310,311,312,313 and 314 of reflect green light.
Liquid crystal light valve 25 comprises liquid crystal board 1B.Liquid crystal light valve 24 and 26 has the structure identical with liquid crystal light valve 25.The liquid crystal board 1B that comprises in liquid crystal light valve 24,25 and 26 is connected with the driving circuit (not shown) respectively.
In projection display device 300, colour splitting prism 21 and projection prism 22 constitute optical group 20.Optical group 20 and the liquid crystal light valve 24,25 and 26 that is provided at regularly on the colour splitting prism 21 constitute display unit 23.
Below, will explain the operation of projection display device 300.
Emission is passed through integrator lens 302 and 303 from white light (beam of white light) transmission of light source 301.The light intensity of this white light (Luminance Distribution) is by integrator lens 302 and 302 and homogenising.In the case, preferred emission is the white lights with big relatively light intensity from the white light of light source 301.This can make the image that forms on screen 320 clearer.In the projection display device 300, has excellent sunproof liquid crystal board 1B, so even emission when the light intensity of light source 301 is big, also obtains good long-time stability owing to use.
The white light of transmission by integrator lens 302 and 303 reflexes to left side among Fig. 6 by mirror 304.Blue light in the reflected light (B) and green glow (G) are reflexed to downside among Fig. 6 by dichronic mirror 305, and the ruddiness in the reflected light (R) transmission is by dichronic mirror 305.
The ruddiness of transmission by dichronic mirror 305 is reflexed to downside among Fig. 6 by mirror 306.By collector lens 310 reflected light is shaped, it is red with on the liquid crystal light valve 24 that it is incident on.
The blue light of dichronic mirror 305 reflection and the green glow in the green glow are reflexed to left side among Fig. 6 by dichronic mirror 307.The blue light transmission is by dichronic mirror 307.
The green glow of dichronic mirror 307 reflections is shaped by collector lens 311, and makes it be incident on green glow with on the liquid crystal light valve 25.
The left side that the blue light of transmission by dichronic mirror 307 reflexed among Fig. 6 by dichronic mirror (or mirror) 308.Reflected light reflexes to upside among Fig. 6 by mirror 309.Blue light is shaped by collector lens 312,313 and 314, and makes it be incident on blue light with on the liquid crystal light valve 26.
So, the white light that is emitted to light source 301 is separated into the red, green and blue three primary colors, the corresponding liquid crystal that leads respectively light valve, and make its incident thereon.
In the case, each pixel of the liquid crystal board 1B that will comprise in liquid crystal light valve 24 (thin film transistor (TFT) 173 and the pixel electrode 172 that connects therewith) is carried out switching controls (ON/OFF), promptly by modulating with the driving circuit (driver element) of picture signal operation based on redness.
Similarly, green glow and blue light are incident on liquid crystal light valve 25 and 26 respectively, and modulate by corresponding liquid crystal plate 1B.Therefore, formed green glow with image and blue light image.In the case, each pixel of the liquid crystal board 1B that comprises in the liquid crystal light valve 25 is used based on green and carried out switching controls with the driving circuit of picture signal operation.In addition, each pixel of the liquid crystal board 1B that comprises in the liquid crystal light valve 26 is used based on blueness and carried out switching controls with the driving circuit of picture signal operation.
Therefore, come modulated red light, green glow and blue light by liquid crystal light valve 24,25 and 26 respectively, and form ruddiness with image, green glow with image and blue light image.
Make the ruddiness image that forms by liquid crystal light valve 24, promptly the ruddiness from liquid crystal light valve 24 is incident on the colour splitting prism 21 from surface 213, reflex to the left side among Fig. 6 on dichronic mirror surface 211, transmission is by dichronic mirror surface 212, then from emitting surface 216 emissions.
Make the green glow image that is formed by liquid crystal light valve 25, promptly the green glow from liquid crystal light valve 25 is incident on the colour splitting prism 21 from surface 214, and transmission is by dichronic mirror surface 211 and 212, then from emitting surface 216 emissions.
Make the blue light image that forms by liquid crystal light valve 26, promptly the blue ruddiness from liquid crystal light valve 26 is incident on the colour splitting prism 21 from surface 215, reflex to the left side among Fig. 6 on dichronic mirror surface 212, transmission is by dichronic mirror surface 211, then from emitting surface 216 emissions.
So, will be from the light of the respective color of liquid crystal light valve 24,25 and 26, promptly the respective image that is formed by liquid crystal light valve 24,25 and 26 merges by colour splitting prism 21.Therefore, form coloured image.With this image by projection prism 22 projections (amplify and projection) on the screen 320 that is arranged on the precalculated position.
Except the personal computer among Fig. 3 recited above (mobile personal computing machine), portable phone among Fig. 4, beyond the digital camera and the projection display device among Fig. 6 among Fig. 5, the example of electronic equipment of the present invention comprises: TV, video camera, find a view type and monitor direct viewing type video tape recorder, automobile navigation apparatus, pager, electronic memo (comprising the electronic memo that has communication function), e-dictionary, electronic calculator, electronic game computer, word processor, workstation, videophone, the crime prevention TV monitor, the electronics binoculars, the POS terminal, the equipment (for example ATM (automatic teller machine) of financial institution and passimeter) that comprises touch pad, Medical Devices (electronic thermometer for example, sphygmomanometer, blood-glucose meter, the cardiogram display device, diagnostic ultrasound equipment and endoscope-use display device), fish finder, various measuring equipments, metering outfit class (for example, vehicle, aircraft, the metering outfit class of boats and ships) and aerolog.Self-evident, liquid crystal board of the present invention can be as the display unit and the monitor unit of these various electron devices and equipment.
On the basis of embodiment shown in the figure, the present invention is explained.But, the invention is not restricted to these embodiments.
For example, form in the method for oriented film, can add one or two or more the steps of purpose arbitrarily in the present invention.In addition, for example, in substrate, liquid crystal board and the electronic equipment that electronic equipment of the present invention is used, the structure of corresponding units or assembly can replace with any structure that shows identical function.In addition, can also add structure arbitrarily.
In the explanation of second embodiment, projection display device (electronic equipment) has three liquid crystal boards, and liquid crystal board of the present invention is used for the whole of these liquid crystal boards.But, at least one liquid crystal board be by liquid crystal board of the present invention constitute just enough.In the case, preferably the present invention is used for the liquid crystal board of blue light with liquid crystal light valve.
In addition, situation that alkoxysilane compound containing trialkylsilyl group in molecular structure contains the curing reaction base describes although embodiment recited above is based on,, not to use this alkoxysilane compound containing trialkylsilyl group in molecular structure that contains the curing reaction base.
In addition, the situation of using multiple alkoxysilane compound containing trialkylsilyl group in molecular structure describes although embodiment recited above is based on,, the invention is not restricted to this situation.For example, can use to contain and wherein exist affinity to give the alkoxysilane compound containing trialkylsilyl group in molecular structure of molecule that base and orientation characteristic are given base.
Embodiment
The manufacturing of＜liquid crystal board 〉
According to the liquid crystal board shown in the shop drawings 2 is described below.
(embodiment 1)
At first, manufacturing lenticule substrate as described below.
Preparation thickness is impregnated in then in the cleaning solution (mixed liquor of sulfuric acid and aqueous hydrogen peroxide solution) of 85 ℃ of temperature, and cleans for the quartz glass substrate (transparent substrates) that is untreated of about 1.2mm.So, with the surface cleaning of quartz glass substrate.
Then, form the polysilicon film that thickness is 0.4 μ m at the surface and the back side of quartz glass substrate respectively by the CVD method.
Then, on the polysilicon film that forms thus, form corresponding to the opening that will form concave part.
This is as described below carrying out.At first, on polysilicon film, form the resist layer of pattern with the concave part that will form.Then, to the polysilicon film dry-etching of CF gas, to form opening.Then, remove resist layer.
Then, the quartz glass substrate be impregnated in the etching solution (mixed aqueous solutions of 10 weight % fluoric acids+10 weight % glycerine) 120 minutes, carry out Wet-type etching (30 ℃ etch temperature), on the quartz glass substrate, to form concave part.
Then, the quartz glass substrate be impregnated in the tetramethylammonium hydroxide aqueous solution of 15 weight %, to remove the polysilicon film that is formed on the quartz glass substrate surface and the back side.So, obtain the substrate of lenticule with concave part.
Then, ultraviolet ray (UV) curable acrylic acid optical adhesive (its refractive index is 1.60) bubble-freely is coated to the substrate surface that lenticule is used concave part that has that wherein is formed with concave part.To combine with optical adhesive by the cover glass (superficial layer) that quartz glass is made.Irradiation ultraviolet ray on optical adhesive with the sclerosis optical adhesive, thereby obtains pressure lamination member.
Then, grind and denude cover glass to thickness, thereby obtain the lenticule substrate with 50 μ m.
In the lenticule substrate that obtains thus, the thickness of resin bed is 12 μ m.
For the lenticule substrate that obtains as mentioned above, using sputtering method and photoetching process to form thickness is that the light that is formed with opening of 0.16 μ m blocks film (Cr film), i.e. black matrix, and its split shed is in the lenticular position corresponding to cover glass.In addition, on black matrix, form the ITO film (nesa coating) that thickness is 0.15 μ m, to make the relative substrate of liquid crystal board by sputtering method.
Then, on the nesa coating of liquid crystal board that so obtains with relative substrate, formation oriented film as described below.
At first, prepare 5.3 weight portions contain vinyl as affinity give the base vinyltrimethoxy silane, 4.8 weight portions contain phenyl as the orientation characteristic give the base phenyltrimethoxysila,e, the 3-glycidoxy propyl-triethoxysilicane that 14.2 weight portions contain glycidoxyalkyl, the tetrahydrofuran of 533 weight portions and the NaOH of 22.5 weight portion 1N.
Be in 1 liter the three-neck flask with these component capacity of being positioned over, then with it 60 ℃ temperature heated and stirred 3 hours.Then, the component in the flask is cooled to room temperature,,, obtains potpourri 1 thus with its neutralization then to the hydrochloric acid that wherein adds 22.5 weight portion 1N.
Then, use evaporator that the tetrahydrofuran in the potpourri 1 is removed, obtain potpourri 2.
Then, use 50 parts by weight of toluene, the polysiloxane (that is, having the polysilsesquioxane of cage structure) that contains in the potpourri 2 is extracted from potpourri 2, obtain extract.
Then, use the distilled water of 50 weight portions and 50 weight portion saturated brines to clean the extract that obtains thus, remove distilled water and saturated brine then, and use anhydrous magnesium sulfate that moisture residual in the extract is dewatered.
Then, use evaporator, from the extract that cleans and dewater, remove toluene, and under the reduced atmosphere of 3.3Pa, remove the low-boiling point material that contains in the polysiloxane, thereby obtain polysilane oxygen material.
Then, the polysilane oxygen material that 0.10 weight portion is obtained thus mixes with 1.90 parts by weight solvent (diethylene glycol monoethyl ether acetic acid esters), obtains potpourri 3.
Then, the use pore size is that the filtrator of 0.2 μ m filters the potpourri 3 that obtains thus, to remove the impurity that contains in the potpourri 3.
Then, 0.001 weight portion 50 weight % are added in the potpourri 3 that obtains thus as the carbonic acid trimethylene ester of hardening agent, obtain oriented film and form liquid, wherein carbonic acid trimethylene ester is by obtaining (thiophene oxy phenyl) hexichol sulfonium hexafluorophosphate and two (hexichol sulfonium) diphenylsulfide hexafluorophosphate mixing.
Then, the oriented film that uses spinner to obtain thus forms liquid and is applied on the nesa coating of liquid crystal board with relative substrate, thereby forms coating layer.
Then, after dry 3 minutes of coating layer that the electric hot plate that uses 150 ℃ of temperature heating will obtain thus, use metal hydroxides lamp (metal hydrate lamp) with x ray irradiation x coating layer 3 minutes, so that its precuring.Then, the temperature of coating layer at 200 ℃ heated 3 hours, so that its full solidification.
Then, the coating layer that solidifies is carried out friction treatment, obtain oriented film thus.
The film thickness of the oriented film of Xing Chenging is 0.2 μ m thus, and in a molecule of the organosilicon material that constitutes oriented film, and containing affinity, to give the ratio of the silicon unit of base be 29 moles of %, and containing the orientation characteristic, to give the ratio of the silicon unit of base be 21 moles of %.When the organosilicon material that is used to form oriented film be synthesize the time, these the value ratio with feed composition is identical basically.In addition, the weight-average molecular weight of organosilicon material is 1,800.
In identical as mentioned above mode, also on the surface of the TFT substrate (making) that separately prepares, form oriented film by quartz glass.
With the liquid crystal board that is formed with oriented film on it with relative substrate with will be formed with the TFT substrate of oriented film on it by the encapsulant combination.Carry out this combination, move 90 °, make the liquid crystal molecule that forms liquid crystal layer turn round to the left side with direction of orientation with oriented film.
Liquid crystal (by Merk Ltd. made: MJ99247) from the filler opening of the gap portion that oriented film between form be injected into gap portion thereafter.Then, close filler opening.The thickness of the liquid crystal layer that forms is about 3 μ m.
Then, by respectively polarizing coating 8B and polarizing coating 7B being combined on the outside surface of liquid crystal board with the outside surface of relative substrate and TFT substrate, make TFT liquid crystal board with the structure shown in Fig. 2.As for polarizing coating, the polarizing coating that the film that use is formed by polyvinyl alcohol (PVA) (PVA) by stretching on the single shaft direction obtains.Determine the bonding position of polarizing coating 7B and polarizing coating 8B respectively based on the direction of orientation of oriented film 3B and oriented film 4B.In conjunction with polarizing coating 7B and polarizing coating 8B, make transmission incident light when applying voltage, and when not applying voltage, not transmission incident light.
The tilt angle of the liquid crystal board of Zhi Zaoing is 3 ° to 7 ° thus.
(embodiment 2 to 5)
At embodiment 2 to 5 in each, make liquid crystal board in the mode identical with embodiment 1, difference is: the alkoxysilane compound containing trialkylsilyl group in molecular structure shown in the use table 1 forms oriented film as alkoxysilane compound containing trialkylsilyl group in molecular structure, and changes the amount of every kind of alkoxysilane compound containing trialkylsilyl group in molecular structure is as shown in table 1.
(embodiment 6 to 8)
At embodiment 6 to 8 in each, make liquid crystal board in the mode identical with embodiment 1, difference is: the alkoxysilane compound containing trialkylsilyl group in molecular structure shown in the use table 1 forms oriented film as alkoxysilane compound containing trialkylsilyl group in molecular structure, change the amount of every kind of alkoxysilane compound containing trialkylsilyl group in molecular structure is as shown in table 1, and with benzophenone as hardening agent.
(comparative example 1)
Make liquid crystal board in the mode identical with embodiment 1, difference is: preparation polyimide resin (PI) (is made by Japan Synthetic Rubber Corporation: solution AL6256), on the transparent conductor film of liquid crystal board, form the film that average thickness is 0.05 μ m by spin-coating method with relative substrate, and film is carried out friction treatment, making its tilt angle is 2 ° to 3 °, to form oriented film.In this comparative example 1, when carrying out friction treatment, produce the material of ashy dirt.
(comparative example 2)
Make liquid crystal board in the mode identical with embodiment 3, difference is: do not use vinyltrimethoxy silane, and the combined amount of every kind of alkoxy silane is changed as shown in Table.
(comparative example 3)
Make liquid crystal board in the mode identical with embodiment 3, difference is: do not use the isobutyl trimethoxy silane, and the combined amount of every kind of alkoxy silane is changed as shown in Table.
The assessment of＜liquid crystal board 〉
For every kind of liquid crystal board making in embodiment 1 to 8 and the comparative example 1 to 3, measure transmittance continuously.By not applying therein under the state of voltage, the corresponding liquid crystal plate is placed under 50 ℃ the temperature and is 151m/mm with beam intensity 2White light irradiation, carry out the measurement of transmittance.
As for the assessment of liquid crystal board, begin irradiation with the liquid crystal board of making in the comparative example 1 from white light and descend time (fast light time) of 50% as a reference up to compare transmittance with initial transmittance, assess liquid crystal board with four standards as described below.
A: with comparing in the comparative example 1, the fast light time is 5 times or bigger.
B: with comparing in the comparative example 1, the fast light time is 2 times or bigger and less than 5 times.
C: with comparing in the comparative example 1, the fast light time is 1 times or bigger and less than 2 times.
D: the fast light time is inferior to comparative example 1.
In the table 1, show the assessment result of liquid crystal board with organized method, what organize together has: be used to form the average thickness of kind, its combined amount of the alkoxysilane compound containing trialkylsilyl group in molecular structure of oriented film, the condition that forms oriented film, every kind of oriented film, the tilt angle in every kind of liquid crystal board.
Table 1, every kind of alkoxysilane compound containing trialkylsilyl group in molecular structure are to use the following expression of abbreviation:
Vinyltrimethoxy silane: VI
Allyltrimethoxysilanis: AL
3-cyano group propyl-triethoxysilicane: CN
Phenyltrimethoxysila,e: PH
Isobutyl trimethoxy silane: IB
3-glycidoxy propyl-triethoxysilicane: GL
2-(3, the 4-epoxycyclohexyl) ethyl trimethoxy silane: EP
3-methacryloxypropyl trimethoxy silane: MA
Table 1
Alkoxysilane compound containing trialkylsilyl group in molecular structure The polycondensation of alkoxy silane The Mw of organosilicon material The average thickness of alignment films [μ m] Tilt angle [°] Photostability
Affinity is given base The orientation characteristic is given base The curing reaction base
Kind Combined amount (weight portion) Kind Combined amount (weight portion) Kind Combined amount (weight portion) Temperature of reaction Reaction time
Embodiment 1 VI 5.3 PH 4.8 GL 14.2 60 3 1800 0.2 3～7 A
Embodiment 2 CN 8.3 IB 3.9 GL 14.2 60 3 1500 0.2 3～7 A
Embodiment 3 VI 5.3 IB 3.9 GL 14.2 60 3 1600 0.2 3～7 A
Embodiment 4 VI 5.3 PH 4.8 EP 14.8 60 3 2000 0.2 3～7 A
Embodiment 5 VI 5.3 IB 3.9 EP 14.8 60 3 2500 0.2 3～7 A
Embodiment 6 VI 5.3 PH 4.8 MA 14.9 60 3 1800 0.2 3～7 A
Embodiment 7 CN 8.3 IB 3.9 MA 14.9 60 3 1500 0.2 3～7 A
Embodiment 8 VI 5.3 IB 3.9 MA 14.9 60 3 1400 0.2 3～7 A
Comparative example 1 - - - - - - - - - 0.05 2～3 -
Comparative example 2 - - IB 3.9 GL 14.2 60 3 1600 0.2 1～2 C
Comparative example 3 VI 5.3 - - GL 14.2 60 3 1600 0.2 1～2 C
Be apparent that as from table 1, compare that liquid crystal board of the present invention shows excellent photostability with the liquid crystal board in the comparative example 1.
In addition, in liquid crystal board of the present invention, obtain enough tilt angles, and can guarantee to regulate the state of orientation of liquid crystal molecule.But, in the liquid crystal board in comparative example 2 and 3, do not obtain enough tilt angles, therefore the state of orientation that is difficult to regulate liquid crystal molecule.
The assessment of＜liquid crystal projection apparatus (electronic equipment) 〉
The TFT liquid crystal board that uses embodiment 1 to 8 and comparative example 1 to 3 to make in each, the liquid crystal projection apparatus (electronic equipment) that assembling has structure shown in Figure 6.Each liquid crystal projection apparatus is driven 5000 hours continuously.
As for the assessment of liquid crystal projection apparatus, observe immediately projected image and the back 5000 hours projected image of driving after driving, and with four criterion evaluation projected image sharpness as described below.
A: observe clearly projected image.
B: observe basically clearly projected image.
C: observe the poor slightly projected image of sharpness.
D: observe unclear projected image.
The results are shown in the table 2.
Table 2
The sharpness of projected image
Immediately projected image after the driving Drive back 5000 hours projected image
Embodiment
1 A A
Embodiment 2 A A
Embodiment
3 A A
Embodiment
4 A A
Embodiment 5 A A
Embodiment 6 A A
Embodiment
7 A A
Embodiment
8 A A
Comparative example 1 A D
Comparative example 2 D D
Comparative example 3 D D
As being clear that, even when the liquid crystal projection apparatus (electronic equipment) that uses liquid crystal board of the present invention to make drives continuously for a long time, also obtained clearly projected image from table 2.
On the other hand, in the liquid crystal projection apparatus that the liquid crystal board that uses comparative example 1 is made, the sharpness of projected image descends significantly along with the passage of driving time.Think that this is to be directed because of the orientation at the starting stage liquid crystal molecule, but oriented film is owing to long-time the driving worsened.As a result, the orientation characteristic of liquid crystal molecule descends.In the liquid crystal projection apparatus that the liquid crystal board that uses comparative example 3 is made, can not obtain clearly projected image in the starting stage that drives.Think that this is because the orientation characteristic of oriented film was just low originally.
When manufacturing comprises personal computer, portable phone and the digital camera of liquid crystal board of the present invention and carries out identical assessment, obtained identical result.
By these results as seen, liquid crystal board of the present invention and electronic equipment have excellent photostability, even and when long-time use liquid crystal board and electronic equipment, also keep stable properties.
At last, although should be noted in the discussion above that and shown some embodiment preferred of the present invention in the above and describe in detail, should be understood that and under the scope of not leaving appended claim, to carry out variations and modifications therein.

Claims (15)

1. oriented film that is used to control liquid crystal molecular orientation, described oriented film is mainly formed by organosilicon material, wherein said organosilicon material in its molecule, comprise at least a be used to improve give base with the affinity of liquid crystal molecule affinity and at least a orientation characteristic that is used to control liquid crystal molecular orientation is given base.
2. it is to be selected from least a in the group that comprises vinyl, alkylene base and cyano group alkyl that oriented film according to claim 1, wherein said affinity are given base.
3. it is to be selected from the phenyl-alkyl of the phenyl that comprises phenyl, replacement, phenyl-alkyl, replacement and to contain at least a in the group of branched alkyl of 3 to 12 carbon atoms that oriented film according to claim 1, wherein said orientation characteristic are given base.
4. oriented film according to claim 1, wherein said organosilicon material contain as the affinity that contains of its key component to be given base and is orientated the silicone materials that characteristic is given base.
5. oriented film according to claim 4, wherein said silicone materials comprise organic polysilsesquioxane of the cage structure that has cage structure or partly split.
6. oriented film according to claim 4, wherein said silicone materials are that the polycondensation by alkoxy silane forms.
7. oriented film formation method according to claim 6, wherein said alkoxy silane comprise that two or more have the different alkoxysilane compound containing trialkylsilyl group in molecular structure of forming.
8. oriented film formation method according to claim 7, wherein said alkoxysilane compound containing trialkylsilyl group in molecular structure with different compositions comprise that containing affinity gives the alkoxysilane compound containing trialkylsilyl group in molecular structure of base and contain the alkoxysilane compound containing trialkylsilyl group in molecular structure that the orientation characteristic is given base.
9. oriented film according to claim 1, the weight-average molecular weight of wherein said organosilicon material are 500 to 50,000.
10. method that forms in the claim 1 oriented film that limits, this method may further comprise the steps:
The preparation substrate;
Prepare oriented film and form liquid, described oriented film forms liquid and contains the material that is used to form described organosilicon material, and described material contains as the affinity that contains of its key component to be given base and be orientated the silicone materials that characteristic is given base;
Described oriented film is formed liquid to be applied on the substrate; And
The oriented film that contains described silicone materials that is coated with is formed liquid-solidization, on substrate, to form described oriented film.
Form 11. oriented film formation method according to claim 10, wherein said silicone materials are the polycondensations by alkoxy silane, and contain at least a curing reaction base that helps described oriented film to form the curing reaction of liquid.
12. oriented film formation method according to claim 11, wherein said curing reaction base are to be selected from least a in the group that comprises glycidoxy-alkyl, alicyclic epoxy base-alkyl, acryloyl group, methacryl, styryl and styryl-alkyl.
13. oriented film formation method according to claim 11, the curing that wherein said oriented film forms liquid is to carry out with the curing reaction base that solidifies described silicone materials by thermal treatment and/or energy light radiation treatment.
14. a liquid crystal board, it comprises:
Liquid crystal layer, it has two faces;
A pair of oriented film, it contacts two faces of described liquid crystal layer respectively, and each oriented film is directed film formed by what limit in the claim 1; With
Pair of electrodes, it offers this to oriented film, and described electrode is not in the face of described liquid crystal layer.
15. electronic equipment, it is equipped with the liquid crystal board that is limited by claim 14.
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